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Characteristics of DOM from different hydrochar and the complexation with tetracycline
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Yun-long SHI1, 2, Hai-rong XIANG1, 2, Hui-fang XIE1, 2, yan-fang FENG3, Huan CHEN1, 2, Bing-yu WANG1, 2, *
China Environmental Science | 2025, 45(8) : 4596 - 4607
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China Environmental Science | 2025, 45(8): 4596-4607
• Emerging Contaminants and Toxicology •
Characteristics of DOM from different hydrochar and the complexation with tetracycline
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Yun-long SHI1, 2, Hai-rong XIANG1, 2, Hui-fang XIE1, 2, yan-fang FENG3, Huan CHEN1, 2, Bing-yu WANG1, 2, *
Affiliations
  • 1.School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
  • 2.Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, Nanjing University of Science and Technology, Nanjing 210094, China
  • 3.Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
Published: 2025-08-20
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Ultraviolet spectra, infrared spectra, and fluorescence spectroscopy with parallel factor analysis were used to explore the complexation heterogeneity and underlying mechanisms between tetracycline (TC) and dissolved organic matter (DOM) from hydrochars of three sources (i.e., sludge, chicken manure, and straw). Results showed that all three hydrochar DOM types exhibited high hydrophilicity and low aromaticity. Among these, straw-derived hydrochar DOM showed relatively higher aromaticity and larger molecular weight, whereas it had lower dissolved organic carbon (DOC) content and richer surface oxygen-containing groups. In contrast, sludge-derived hydrochar DOM possessed the highest DOC content but the lowest aromaticity and molecular weight. The fluorescence quenching of the three hydrochar DOMs by TC was static quenching. Sludge- and chicken manure-derived hydrochar DOMs showed significant quenching effects. The complexation constants (lgK) ranged from 4.48to 5.81 for sludge-derived hydrochar DOM and from 5.94 to 6.33 for chicken manure-derived hydrochar DOM, with corresponding capacities (f) of 0.21~0.40 and 0.14~0.46, respectively. Further analysis indicated that TC tended to quench the protein-like components in hydrochar DOM. The chicken manure-derived hydrochar DOM exhibited the strongest binding affinity with the protein-like component (C4), with the highest lgK of 6.33 and f of 0.46. The complexation effects between different source-derived hydrochar DOMs with TC varied, influencing the environmental occurrence, migration, and bioavailability of TC.

hydrochar  /  dissolved organic matter  /  complexation  /  tetracycline
史云龙, 向海荣, 谢慧芳, 冯彦房, 陈欢, 王冰玉. 不同来源水热炭DOM特征及其与四环素的络合作用. 中国环境科学, 2025 , 45 (8) : 4596 -4607 .
Yun-long SHI, Hai-rong XIANG, Hui-fang XIE, yan-fang FENG, Huan CHEN, Bing-yu WANG. Characteristics of DOM from different hydrochar and the complexation with tetracycline[J]. China Environmental Science, 2025 , 45 (8) : 4596 -4607 .
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Year 2025 volume 45 Issue 8
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Article Info
  • Receive Date：2025-01-26
  • Online Date：2026-10-08
  • Published：2025-08-20
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  • Received：2025-01-26
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Affiliations
    1.School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
    2.Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, Nanjing University of Science and Technology, Nanjing 210094, China
    3.Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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